Furnace construction



July 3l, 934., J. WARD ,968,186

FURNACE CONSTRUCTION Filed May 22, 1933 Patented July 31, 1934 1,968,186

NEE S'Y'TES'A 'BTE FURNACE ooNsraUo'rroN k James Inward, St. Louis, Mo. Y Application May 22,y 1933, seriai No, @72,213 l l :'Q'olaims. (C1. 110-24) The invention has among its objects, the pro- Figure `3 is a perspective detailvof the sectional duction of a device adapted to be placed within member. f, the iirebox ofl a furnace, and which will increase Referring more particularly tothe drawing, the efliciencyof combustion therein, which shall wherein I have illustrated one of the preferred v5 be neat and simple in construction, easily inembodiments of my invention, there is shown aV @D stalled and removed, economical, sturdy and longportion of a furnace of any size, shape'and maf lasting, reliable, satisfactory and efficient foruse terial, the samenot forming a part of my inven-VK wherever deemed applicable. Ytion, the. frebox of the same being represented One of the objects of my invention is to provide generally at A, the grate bars at B and upon a member for positioning within the firebox of a which the fuel bed forms as is customary, and the 65 furnace, adjacently below the coal-intake opencoal feeding opening C. ing, and which will form a support for receiving It is usual good firing practice to push the old the said fuel, said member being inclined rearcoal backwardly to the rear of the rebox before wardly and downwardly so that said green coal feeding the fresh or green coal into the front may bpe easily moved further rearwardly tothe of the flreboX, but even so, there is apt to be some 7G old fuel bed as it burns. Unless the old fuel is ignition of the fresh fuel taking place adjacent pushed back into the firebox, and the green coal the front of the furnace too quickly for efcient placed adjacent the front, inefficient combustion burning, and the path of the draft is upwardly takes place, not only decreasing the effectiveness through the fresh fuel-bed as well as the old fuelof such firing, but also increasing the percentage bed. 75 of smoking of the furnace, and hence, with loss in In order to block off the path of the draft in economy of operation. those portions found undesirable, and to insure My invention has among its further objects, that the fresh fuel will be ignited only adjacent the production of amember of the kind described, the top of the fresh fuel bed and just about at and which when placed within aiirebox in a upthat portion which adjoins the old fuel, I have 80A draft furnace, insures that the ignition of the fuelV provided a member adapted to be inserted into will take place adjacent the top of the coal, inthe iire-box,vsaid member consisting of the pair stead of adjacent the bottom of the same, in of mating sections 1 and 2 telescopically interaccordance with good engineering precept. connected so as to be adjustable for overall length,

Another object of my invention is to provide as by means of the cooperating tongue and groove 85 a member of the kind set forth, in which the same 3 and 4, respectively, shown. is made in a plurality of mating sections easily Trunnions 5 provide end bearings for the secset in place in operative position within the firetions 1 rand 2, to be received within suitable box, and similarly easily collapsedor telescoped openings or pockets provided through the wall for removal from the same for replacements or of the iirebox, the front edge of the member being 90- for any other causes. of a contour substantially similar to that of the Many other objects and advantages of the confront of the re-box, as at 6, the same being arcustruction herein shown and described, and the ate in the form Yshown in the drawing. Said uses mentioned, will be obvious to those skilled front edge 6 of the member rests or bears against in the art to which this invention appertains, the adjacent surface of the fireboX wall and sub- V95 from the disclosures herein given. stantially seals the same against draft passage To this end, my invention consists in the novel therealong. f l construction, arrangement, and combination of Flat wedge elements 'land 8 are dovetailed into parts herein shown and described, and the uses place between the spaces between the sections mentioned, as will be more particularly pointed 1 and 2, at top and bottom thereof, so as to sub- 100 out in the claims. stantially close said spaces thereacross, and fur- In the drawing, wherein like reference charther to force said sections into firm engagement acters indicate like or corresponding parts at either end, with the rebox, and thus retain the throughout the views, sections in position therein. Removal may be Figure 1 isa horizontal cross-sectional view had simply by knocking out the wedges, and then 105 through the rebox of a furnace, in which my moving the sections together and out of the fireinvention is shown; box.

Figure 2 is a vertical cross-section there- The sections are so proportioned that the arcuthrough, taken substantially along the line 2 2 ate front edge 6 will rest against the surface of of Figui; and the rebox adjacent thereto, to effectually seal 110 iria-Vi the same against draft leakage to large degree thereat, and so that the top surface of the sections will be inclined downwardly and rearwardly of the firebox, somewhat as shown. In this manner, the fresh coal may be dumped onto the member, a portion of the same feeding down on the inclined surface to adjacent the old coal which has been previously pushed back, and the remainder remaining thereon until it is pushed back subsequently when a, fresh supply is to be fed into the rebox.

The draft will not go upwardly in front of the sections 1 and 2, as the same is substantially blocked thereat, and the fresh coal will therefore be ignited at the top of its depth or body, which has been found to be the most efficient manner of firing coal in a furnace of the up-draft type.

Ribs 9 may be provided on the sections 1 and 2 to reinforce the same against warping, especial- 1y in those instances where the firebox is rather wide at the front, although they may be dispensed with for small or average sized reboxes.

What I'claim as new and desire to secure by Letters Patent is:

1. "'A platemember of the-kind described, com prising a pair of .mating sections insertible into the fireboxof a furnace and to receive the charge of coal thereon,-said sectionsengaging the front scopic adjustment, the opposite ends of said platev sections being engageable with the rebox wall, and Wedge elements slidably movable between the adjoined ends of said sections to force the sections laterally outwardly simultaneously into firm engagement with the rebox.

3. The combination with a furnace having a grate and a rebox thereabove and with sockets in the side wall of said rebox, of a pair of plates within said rebox above said grate and with trunnionsat their outer ends to engage within said sockets, the adjacent ends of said plates beling oooperatingly tongue and grooved below the top surface of the plates for telescopic adjustment of the latter, anda wedge between said Vlast-mentioned ends above said tongue and groove andy flush with saidtop surface ofthe plates'to spread said plates apart to forcesaid trunnions into iirm engagement with said sockets.

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